This evolutionary process, still making its impact felt today, became increasingly pronounced in the years between 1910 and 1930. Even before the first blues recordings were made, the blues idiom began filtering into the mainstream of American parlor sheet music, under the influence of Tin Pan Alley songwriters such as W. C. Handy.
Wind energy supplied 4.7 percent of the total electricity generated in the U.S. in 2015, enough electricity to supply the equivalent of all electricity demand in Colorado, Oklahoma, and Kansas. Solar energy, including utility-scale and distributed solar, generated 0.94 percent of all U.S. electricity in 2015. The emerging opportunities in American wind power will be on display at this yearâs WINDPOWER Conference & Exhibition in New Orleans, May 23-26.
These days, 6 percent of U.S. electricity comes from hydropower (that's 70 percent of the renewable electricity generated in the U.S.) [source: U.S. DOE]. The supply is limitless, although not every area is a good place to build a hydroelectric project.